Review on ⚡️ UCTRONICS US Plug LCD Digital Voltmeter 220V Panel Voltage Tester Meter - Accurate Voltage Measurement for Wall Sockets at Home & Factory by Robert Oner

Use this in our RV and there was a power outage at the campsite on the 4th of July while camping. When my wife looked at the volt meter it said 30 volts so I immediately turned off the switch and grabbed the volt meter and then hooked it up to the breaker box which read 30 volts there too. I leave it on all the time and watch the tension as I drive by in the RV. Definitely recommend